Electrophoresis coating originated in Japan and was actually processed on the basis of anodic oxidation. The electrophoresis coating has a double layer of anodic oxide film and polymer coating. Electrophoretic painting is to build and the corresponding electrode into the liquid water soluble resin electrophoresis paint, when dc power supply is connected, under the action of electric field, the sedimentary formation of uniform film coating on the parts of a process, a uniform paint film, strong adhesion, high utilization rate of coating, construction speed is a little bit. It also has good coating effect for the profile.

Phosphating primer treatment

In the aluminum alloy surface etch primer coating is formed at the same time in the aluminium phosphide coating, can etch primer itself priming effect alone, is a kind of surface pretreatment method, mainly used in anodic oxidation and chemical oxidation components will not work. Etch primer of makings, component a is given priority to with polyvinyl butyral resin, with chromate antirust pigments and additives, such as component secondly, phosphoric acid, part before use in accordance with the provisions, mix proportion, spray paint on aluminum plate surface part of aluminum phosphate and metal combination, make the metal surface and the primer coating system has good combining ability. However, the phosphate primer is high on the construction condition, and slightly less careful, can cause the paint film to be brittle, cause the serious consequence of the large-scale drop paint.

Ion implantation

Ion implantation method is developed in the 70 s, a surface modification technology, has successfully such as steel, titanium alloy matrix into the surface of Ti, C and N elements, improve the wear resistance and corrosion resistance of substrate material, and has been put into production. In recent years, researchers have also conducted ion implantation research on aluminum surface and made some progress. In the H2SO4 solution, the electrochemical properties of the aluminum electrode injected with Pb were studied by the [15]. The experiment shows that in H2SO4 solution, the aluminum electrode injected with lead has good corrosion resistance, and it is expected to extend the application of aluminum or aluminum alloy to such industries as wet metallurgy and electroplating.